Portable lamp



W. J. SPE'NCE PORTABLE LAMP Filepl May 15, 1922 Z0 Patented Got. ifi,1%23}.

' nwirsn WILLI M'J. srnivon, or LYNN, nrnssaonusnrrs.

ron'reetn LAMB.

i Application filed. May 15,

To aZZ whom it may concern:

Be it known that I, VVILLIAM J. Srnnon,

a subject of the King of Great Britain, and a resident of Lynn,Massachusetos, have in- 5 vented sin-improvement in Portable Lamps,

of which the following description, in connection with the accompanyingdrawings, is a SpGC1fiCatlOI1,,l1k8 letters'on the drawings I 7 appearas the description of the lnventlon representing like parts.

Mypresent invention relates to lighting fixtures and more particularlyto a portable lighting fixture orlamp base of the type ordinarily knownas desk or reading lamps.

In the construction of this particular class of device, dirficulty hasbeen experienced in so devising the swivel portions that thesame may bereadily'adjusted with a minimum eiiort and have theparts'remain in theiradjusted position. I have obviated 550 the objectionable features ofprior devices of this character and have devised a swivel joint for thelower end of the goose-neck which is relatively free to move for thepurpose of adjusting the goose-necln'and in any adjusted position, willremain there without danger of accidental displacement. Again, I havearranged the goose-neck to be constructed of relatively light.commercial hollow tubing and have formed a socket or lamp 0 holding endintegral with the goose-neck .itself, this construction reducing .thenumber of'parts heretofore deemed necessary in thisclass of apparatusand the resultant structure is simple in character, neat in appearance,and eiiicient in operation. My irn proved form of swiveljoint for use inattaching'the lower end of the goose-neck to the base properor thedevice is arranged to,

hold the goose-neck in position under a constant spring tension and thistension maybe adjusted as desired, and when once adjusted, will remainin this condition indefinitely.

I find it possible to adjustthe tension of this portion" of theapparatus during the proo 2 ess of manufacture and therefore provide nomeans, readily accessible to the user, for

adjusting the tension of the joint'after it leaves the factory, ithavingbeen found that the constant adjustment of this joint by the user'inprior devices resulted in rapid de-' terioration of the device.adjustment was necessary in prior apparatus because of the defectiveform of swivel device employed.

The particular object of my invention,

swivel joint applicable for use'in devices of Such continual 1822.Serial no. 561,075.

base. Another object is an improved form of this character.

Other objects and novel features of the construction and arrangement ofparts of the device constituting my invention will 4: is a section onthe line of' liig; 1; and

Fig.5 is asection on the line 5-5 of Fig. i

1, but showinga slightly modified form'of swivel joint. 1

Referring to the drawings, 10 designates a base of any suitable size andcontourhaving upwardly extending therefrom lugs 11 and 12 spaced apartfrom each other a suitable distance to receive the lower end of agoose-neck, 1& and said base and lugs may be of any suitable metal. ormaterial and may be as plain or ornamental as may be de- 35 sired. Eachlug 11 and 12 is provided with a hole 13. these holes'fbeingot anysuitable size andare in alinement with each other theafies ofthe holesbeing horizontal. Fiting within each hole 13 is a cylindrical mem- 99ber 1501 a width equal to'the widthof the lugs 11 and 12 and preventedfrom rotation in the holes 13 by pins 35. This cylindrical i member isprovided witha plurality of slots of saw cuts 16 on either side thereofand these slots or saw cutsextend a substantial distance beyond thecenter of such member. These members 15 are drilled to receive a rod 17'threaded at each end to receive collars 18 and these collars areprovided with 190 holes or depressions 19 toreceive a'spanner foradjustnig purposes.

The goose-neck 14: is preferably formed of commercial square brasstubing and may be of any conventionalform, the upper end be- I thispivotal mounting: being comprised'of a W or seat upon the ears 11 and12.

- sembled position.

joint the adjustment is made at the factory shown) 'near the bottomwhere it may be provided with the usual plug for attachment to a sourceof current.

It will be obvious from the above that the collars18 may be utilized toforce the members 15 toward or from each other thereby varying thefriction between them and the lower end of the goose-neck 14. Also saidcollars 18 are compressible until they contact Thus the tension exertedby said members 15' on the lower end of the goose-neck 14- is variablyadjusted. The position of the goose ncckis, and parts attached to theupper end thereof with respect to base 10, maybe varied at will and thespring tension exertedon the lower end 'of the goose-neck I l by theinemhers 15 insures that such goose-neck 14 will be securely held in anyposition towhich the same may have been moved while vet a-llowing properadjustment thereof. Further. the position of the socket 26 and bulb 27,may be variedwvith respect to the gooseneclr 14 by use of the wing nut24 on the threaded screw 23.

Referring to Fig. 5. illustrating a modification ofthe swivel jointabove described, 11 and 12 desi nate the spaced ears and l t the-lowerend of the goose-neck 14:,-Wlll.1

,in the holes 13 of the ears'aud in engagement with the sidewalls of thegoose-neck 14 are metallic washers 29. In said holes 13, and spacedapart from the washers 29 by preferably ibre washers 30. are other metallie washers 31 secured against rotation in the holes13 by pins 32.Againstthe outer faces of the ears l1 andj12 are collars 33, the col-'lars 33-and washers 29, 80, and 81 and the lower end of the goose-neck1% being'pen. forated to receive a shatt 3e, this shaft being preferablyheaded over or riveted to se-' cure theconstruction justdescribed in asIn this form of swivel by a skilled workman, and once made, has

been found to last throughout the life of the device thereby renderingunnecessary, and preventing, any tamperin with the device by the user;

While I have necessarily shown and de scribed the preferred embodimentof my invention in detail, it is understood that I may vary the detailsof the construction and arrangement of partsshown within wide limitswithout departing from the spirit of the invention.

Having thus described my invention, what I claim as new is:

1. In an improved lamp base, the com- .bination of a base, a pair ofcars spaced apart from each Gamma extending'upwardly therefrom, alinedperforations in said ears split spring members in said pertorations, agoose-neck, a threaded shaft passing through the lower end of thegooseneck and through the split spring members, and means for adjustingthe pressure on the split spring members for varying the tension exertedthereby on the gooseneck.

2. In an improved lamp base, the combi nation of a base, a pair of earsspaced apart from each other and extending upwardly from the base.alined perforationsan said perforations, means for preventing rotationof said members in said perforations, a goose-neck, a threaded shaftpassing through the lowerend of the goose-neck and through the splitspring members, and means for ad'- justing the pressure on the splitspring members for varying the tension exerted thereby on thegooseaieclr.

3. In an improved lamp base, the combination of a base. a pair of earsextending upwardly therefrom and spaced apart from each other andprovided with alined perforations whose axes arehorizontal, trio tionmembers in said perforations. a shaft passingthrough said frictionmembers, a

goosemeckpivotallymounted on said shaft and in engagement on oppositefaces with the friction members, a fork formed integral with, and at theupper end of. said gooseneck, a yoke pivotallyand ad ustably mounted atthe-extremity of said fork, and

, a lightingdevice attached to said yoke.

In testimony whereof. I have signed my name to this specificatlon.

' WILLIAM J. srn von.

ears, split spring members fitting in said

